GB788801A - Improvements in or relating to sonic gas analysers - Google Patents
Improvements in or relating to sonic gas analysersInfo
- Publication number
- GB788801A GB788801A GB7241/55A GB724155A GB788801A GB 788801 A GB788801 A GB 788801A GB 7241/55 A GB7241/55 A GB 7241/55A GB 724155 A GB724155 A GB 724155A GB 788801 A GB788801 A GB 788801A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- transducers
- transducer
- container
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2462—Probes with waveguides, e.g. SAW devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/103—Number of transducers one emitter, two or more receivers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2695—Bottles, containers
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Relates to sonic or ultrasonic gas analysers in which changes in the composition of a variant gas are determined by measuring the phase difference between (1) voltages applied to and derived from transmitting and receiving transducers spaced apart in said gas; (2) voltages derived from two spaced transducers receiving vibrations emitted from a single transmitter; or (3) voltages derived from two receiving transducers located respectively in the variant gas and in a datum gas, said transducers receiving vibrations transmitted through said variant and datum gases from respective transducers energized from a common source. According to the present invention the formation of standing waves in the gas is prevented by packing the <PICT:0788801/III/1> gas container A with a material C, impervious to water vapour and to the gas, and having interstices, e.g. grains of plastic material such as polyethylene, metallic granules or small pieces of glass or like substance; a suitable particle size for a tube one inch diameter and at a sound frequency of 3000 c/s. is 1/10 -\ba1/8 inch mesh. As shown, a transducer M is mounted in a housing B adjacent a perforated portion of the container A by means of a polytetrafluorethylene washer E, rubber washers F and G, resilient pad H and a screw plug J, a glass diaphragm D being provided to prevent contact between the gas and the transducer; the spaces between the diaphragm D and the transducer and between the diaphragm D and the container A may be loosely packed with glass wool. Alternatively the transducer may be isolated from the gas in the container A by a film of inert gas. In a modification, Fig. 3 (not shown), suitable for use when the analysis chamber is maintained at a high temperature the transducers are mounted at the outer ends of branch tubes connected to the chamber in the same manner as the housing B, the branch tubes being also packed with the granular material C.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB344234X | 1955-03-11 | ||
| GB230256X | 1956-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB788801A true GB788801A (en) | 1958-01-08 |
Family
ID=26256261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7241/55A Expired GB788801A (en) | 1955-03-11 | 1955-03-11 | Improvements in or relating to sonic gas analysers |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2963899A (en) |
| CH (1) | CH344234A (en) |
| DE (1) | DE1060629B (en) |
| FR (1) | FR1142862A (en) |
| GB (1) | GB788801A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1357724A (en) * | 1970-05-05 | 1974-06-26 | Sevcon Eng Ltd | Apparatus for detecting the evolution of gas from the cell' of a lead-acid battery |
| DK163537C (en) * | 1990-03-05 | 1992-08-03 | Fls Airloq As | METHOD AND APPARATUS FOR TRANSMISSING AN ACOUSTIC SIGNAL IN A PHOTOACUSTIC CELL |
| US5159843A (en) * | 1991-02-19 | 1992-11-03 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Acoustic device and method for measuring gas densities |
| FR2808603A1 (en) * | 2000-05-05 | 2001-11-09 | Photomeca Sa | Regulation of the solid material content of a developing solution used in the production of photopolymer printing plates by ultrasound emission |
| CZ2011184A3 (en) * | 2011-04-01 | 2012-12-19 | Procháska@Aleš | Device for measuring oxygen concentration in gaseous mixtures containing helium and/or hydrogen |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US379608A (en) * | 1888-03-20 | Steam-muffler | ||
| US1387003A (en) * | 1920-02-14 | 1921-08-09 | Edward G Hedges | Antifouling muffler for flush-pipes |
| GB574819A (en) * | 1943-08-20 | 1946-01-22 | Bendix Aviat Corp | Apparatus for testing the density of fluids |
| US2521634A (en) * | 1947-03-04 | 1950-09-05 | William H Janssen | Acoustic chamber for analysis of gaseous mixtures |
| US2775309A (en) * | 1954-03-15 | 1956-12-25 | Acoustic Res Inc | Sound translating devices |
-
1955
- 1955-03-11 GB GB7241/55A patent/GB788801A/en not_active Expired
-
1956
- 1956-03-06 US US569857A patent/US2963899A/en not_active Expired - Lifetime
- 1956-03-08 CH CH344234D patent/CH344234A/en unknown
- 1956-03-08 DE DEP15818A patent/DE1060629B/en active Pending
- 1956-03-09 FR FR1142862D patent/FR1142862A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1142862A (en) | 1957-09-24 |
| CH344234A (en) | 1960-01-31 |
| DE1060629B (en) | 1959-07-02 |
| US2963899A (en) | 1960-12-13 |
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